JP5570301B2 - Image stabilization apparatus and optical apparatus - Google Patents

Description

  The present invention relates to an image shake correction apparatus mounted on an optical apparatus.

  The image blur correction device moves the movable member holding the lens independently in the direction in which the camera is shaken in the horizontal direction (hereinafter referred to as the yaw direction) and in the direction in which the camera is shaken in the vertical direction (hereinafter referred to as the pitch direction). It is necessary to support it so that it can move without friction.

  In order to realize this, in Patent Document 1, a guide member having a ball holding portion extending in the yaw direction and the pitch direction is provided between the fixed member and the movable member that holds the lens.

Japanese Patent Laid-Open No. 11-007051

  However, the image blur correction apparatus disclosed in Patent Document 1 has a problem in that since the components overlap in the optical axis direction, the position of the lens tends to shift and the optical performance deteriorates if the processing accuracy of the components varies. In addition, there is a problem that it is difficult to reduce the thickness of the entire apparatus. Furthermore, there has been a problem that the ball comes off at the time of assembly or impact.

  Accordingly, an object of the present invention is to provide an image shake correction apparatus and an optical apparatus in which the thickness in the optical axis direction is reduced.

Image blur correction apparatus according to one aspect of the present invention, there is provided a image blur correction apparatus for correcting image blur by moving in a plane perpendicular to the optical axis of light chemical elements that will be placed in the barrel, the A first rolling member for moving the optical element in a first direction orthogonal to the optical axis, and a first rolling member for supporting the first rolling member so as to roll in the first direction. A bearing member, a guide member supported by the first rolling member and movable in the first direction, and the first rolling member of the first rolling bearing member are provided. is fixed to the surface on the side, have a, a fixed member fixed to said lens barrel, the fixing member, characterized in that have a first through hole for accommodating the first rolling member And

  According to the present invention, it is possible to provide an image shake correction apparatus and an optical apparatus in which the thickness in the optical axis direction is reduced.

FIG. 3 is an exploded perspective view showing a component configuration of the image shake correction apparatus of the present invention. It is a front view of a fixed ground plane. It is a front view of a movable barrel. 1 is a schematic diagram showing a configuration of an image shake correction apparatus of the present invention. It is a block diagram for demonstrating a general anti-vibration system. It is sectional drawing which passes along the center of a rolling ball in a 2nd Example. It is a disassembled perspective view which shows the components structure of the conventional image blur correction apparatus. It is a schematic diagram showing the structure of the conventional image blur correction apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  First, a conventional image blur correction apparatus will be described with reference to FIGS. FIG. 7 is an exploded perspective view showing the structure of a conventional image shake correction apparatus, and FIG. 8 is a schematic view of the image shake correction apparatus after assembling FIG. 7 cut in parallel to the optical axis.

  This conventional image blur correction apparatus includes a correction lens 301, a fixed base plate 302, a movable barrel 303, a guide member 304, a first rolling ball 305, first rolling receiving members 306 and 307, a second rolling. It has a ball 308 and second rolling receiving members 309 and 310. Further, the power supply cable 311 and the urging member 312 are provided.

  The rolling balls 305 and 308 are preferably made of a hard material in order to reduce rolling resistance.

  In addition, the fixed base plate 302 and the movable lens barrel 303 provided with positioning with various components have a complicated shape, and are most suitably manufactured by resin molding.

  On the other hand, when the load on the movable member increases, for example, when the lens weight increases, a large pressure is generated at a location that comes into contact with the rolling ball. In the structure in which the mold resin and the rolling ball are brought into contact with each other, there is a risk of deformation and wear due to this pressure. Therefore, it is necessary to attach rolling receiving members 306, 307, 309, and 310 for receiving rolling balls to the movable lens barrel 303 and the fixed base plate 302, which are mold members. Further, the rolling receiving member is made of a hard material such as stainless steel, and is suitably manufactured by press molding.

On the other hand, the image shake correction apparatus is attached to a lens barrel member (not shown) that supports another lens group and an imaging member such as a film or a CCD by an attachment portion provided on the fixed base plate 302. Therefore, by accurately adjusting the position and inclination in the optical axis direction between the fixed base plate 302 and the lens barrel (not shown), it is possible to position with high accuracy with respect to other lens groups and imaging members.

  However, in this conventional image blur correction apparatus, the first rolling receiving member, the first rolling ball, the guide member, the second rolling ball, the second rolling ball, and the like are disposed between the fixed ground plate 302 and the correction lens 301. Two rolling receiving members and many parts are interposed.

  Among these, the first rolling receiving member, the guide member, and the second rolling receiving member that are processed by press molding have large thickness variations, and when the lot changes, the gap between the correction lens 301 and the fixed base plate 302 is changed. There was a problem that the positional relationship would change. In particular, when the rolling receiving member is divided into two parts as in the conventional image shake correction apparatus shown in FIGS. 7 and 8, the correction lens 301 falls from the reference position due to variations in the respective plate thickness, and the performance of the lens is reduced. There was a problem of getting worse.

  Furthermore, as shown in FIG. 8, there is a problem that it is difficult to reduce the thickness in the optical axis direction because the components overlap in series in the optical axis direction.

  In the above configuration, the power supply cable 311 for supplying power to the coil fixed to the movable lens barrel 303 is fixed to the upper part of the movable lens barrel 303 with double-sided tape or the like. For this reason, when the double-sided tape is peeled off, it interferes with other components, which may hinder the movement of the movable lens barrel 303.

  In addition, since the space around the ball is a problem, the ball may roll during assembly, resulting in poor workability, and the ball may drop out of place when the device is subjected to vibration or impact. .

  Next, an image blur correction apparatus according to the first embodiment of the present invention will be described with reference to FIGS.

  First, a general vibration isolation system will be described with reference to FIG.

  FIG. 5 assumes a system that suppresses image blur caused by camera vertical shake 461p and camera horizontal shake 461y in the direction of the arrow 461 shown in the figure.

  In the figure, reference numeral 462 denotes a lens barrel having a photographing optical system, and reference numerals 463p and 463y denote angular displacement detection devices for detecting camera vertical shake angular displacement and camera horizontal shake angular displacement, respectively. The respective angular displacement detection directions are 464p and 464y. It is shown by. Reference numerals 465p and 465y denote arithmetic circuits which calculate signals from the angular displacement detection devices 463p and 463y and convert them into drive target signals for the image blur correction device 400. Then, the image blur correction device 400 is driven by this signal to ensure stability on the image plane 469. Reference numerals 467p and 467y denote driving units of the image blur correction apparatus 400, and reference numerals 468p and 468y denote shift position detection sensors for the correction lens.

  Next, the configuration of the image blur correction apparatus 100 proposed in the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1 is an exploded perspective view showing a component structure of the present embodiment.

  The image shake correction apparatus according to the present exemplary embodiment includes a correction lens 101, a fixed base plate 102, a movable lens barrel 103, and a guide member 104. The first rolling balls 1051, 1052, 1053, the first rolling receiving member 106, the second rolling balls 1071, 1072, 1073, and the second rolling receiving member 108 are provided. Further, it has a sub plate 109, a power feeding cable 110, an urging spring 111, pitch magnets 1121 and 1122, yaw magnets 1131 and 1132, an upper yoke 114, a pitch coil 115, and a yaw coil 116.

  The correction lens 101 is a lens that forms part of an imaging optical system (not shown), and is a shake optical element that decenters the optical axis. By moving in a plane perpendicular to the optical axis, an image formed by the imaging optical system can be moved. Thus, when camera shake is detected, stability on the image plane can be ensured by the above-described method.

  In this embodiment, a lens is used as the shake optical element, but an image sensor such as a CCD or a C-MOS sensor may be used.

  As shown in FIG. 2, the fixed ground plate (fixing member) 102 is formed in a substantially disk shape, has an opening at the center, and allows a light beam to pass therethrough.

  Further, as shown in FIG. 1, the fixed ground plate 102 has mounting holes 1021 that can fix three mounting rings on the outer peripheral side surface portion. Using this hole, it is fixed to a lens barrel that fixes another lens group (for example, an imaging optical system). That is, the mounting hole 1021 is a reference position for the image blur correction apparatus.

Further, as shown in FIG. 2, the fixed ground plate 102 has a first rolling ball arrangement groove (first opening) 1022. The same number of first rolling ball arrangement grooves 1022 as the number of first rolling balls (three in this embodiment) are provided, and the first rolling balls 1051, 1052, and 1053 are accommodated therein. be able to. Further, the size of the opening of the first rolling ball arrangement groove 1022 is larger than the movable range of the first rolling balls 1051 , 1052 , and 1053 . That is, the width of the opening of the first rolling ball arrangement 1022 groove is wider than d and narrower than 2d, where d is the width of the first rolling ball. This is because if the width of the opening of the first rolling ball arrangement groove 1022 is narrower than d, the first rolling ball cannot contact and roll. On the other hand, if it is larger than 2d, it is disadvantageous for space saving, and assembly described later becomes difficult.

The fixed ground plate 102 has a first rolling ball arrangement hole 1023 (first opening). One first rolling ball arrangement hole 1023 is provided, and the second rolling ball 1073 can be accommodated therein, and the size of the opening of the hole is the movable of the second rolling ball 1073. Greater than range. Since the second rolling ball 1073 rolls in the plane in which the movable lens barrel 103 is orthogonal to the optical axis, the first rolling ball placement hole 1023 is formed from the opening of the first rolling ball placement groove 1022. Has a large opening. As shown in FIG. 2, the opening of the first rolling ball arrangement hole 1023 has a circular shape, and the opening of the first rolling ball arrangement groove 1022 has a long hole shape that is long in the pitch direction. However, this invention is not limited to this shape, For example, a rectangular shape may be sufficient.

  As shown in FIG. 4, the first openings 1022 and 1023 are configured as through holes that are orthogonal to the upper and lower surfaces of the fixed base plate 102.

  The fixed ground plate 102 has three spring hooks 1024 to which the biasing spring (elastic member) 111 is attached.

  As shown in FIG. 3, the movable lens barrel (movable member) 103 can hold the correction lens 101 in the central opening.

  The movable lens barrel 103 is supported so as to be movable in a plane perpendicular to the optical axis with respect to the fixed base plate 102 by a method described later.

The movable lens barrel 103 has two second rolling ball arrangement grooves (second openings) 1031 and one second rolling ball arrangement hole (second opening) 1032. . The second rolling ball arrangement groove 1031 can accommodate the second rolling balls 1071 and 1072 therein, and the size of the opening of the groove is larger than the movable range of the second rolling ball. It is getting bigger. That is, the width of the opening of the second rolling ball arrangement groove 1031 is wider than the width d of the second rolling balls 1071 and 1072 , and is narrower than the width 2d. This is because if the width of the opening of the second rolling ball arrangement groove 1031 is narrower than d, the second rolling balls 1071 and 1072 cannot contact and roll . On the other hand, if it is larger than 2d, it is disadvantageous for space saving, and assembly described later becomes difficult. The second rolling ball arrangement hole 1032 can accommodate the second rolling ball 1073 therein, and the size of the opening of the hole is larger than the movable range of the second rolling ball 1073. . Since the second rolling ball 1073 rolls in a plane perpendicular to the optical axis of the movable barrel 103, the second rolling ball arrangement hole 1032 is formed from the opening of the second rolling ball arrangement groove 1031. Has a large opening. In addition, as FIG. 3 shows, the 2nd rolling ball arrangement | positioning hole 1032 has circular shape, and the 2nd rolling ball arrangement | positioning groove | channel 1031 has a long hole shape long in a yaw direction. However, this invention is not limited to this shape, For example, a rectangular shape may be sufficient.

  As shown in FIG. 4, the second openings 1031 and 1032 are configured as through holes orthogonal to the upper surface and the lower surface of the movable lens barrel 103.

  The movable lens barrel 103 has a groove 1033 to which the sub plate 109 is attached.

  The movable lens barrel 103 has three spring hooks 1034 for fixing the biasing spring 111.

  In addition, the movable lens barrel 103 has an LED holder 1035 for attaching an LED that is a detected portion detected by the position sensor.

  In addition, the movable lens barrel 103 can fix the pitch coil 115 and the yaw coil 116.

  The guide member 104 is made of a highly wear-resistant material such as stainless steel. Thereby, even if it uses a hard material for a rolling ball, it can endure long-term use, without a contact part being shaved.

  The guide member 104 is supported so as to be movable in the yaw direction (first direction) with respect to the fixed base plate 102. The movable lens barrel 103 is supported so as to be movable in the pitch direction (second direction).

  Here, the pitch direction and the yaw direction are orthogonal to each other. Further, the pitch direction and the yaw direction are directions orthogonal to the optical axis. Thereby, the movable lens barrel 103 is supported so as to be movable without rotating in a plane orthogonal to the optical axis with respect to the fixed base plate 102.

As shown in FIGS. 1 and 4, the guide member 104 has two first rolling guide portions 1041. The first rolling guide portion 1041 has a V-shaped cross section with respect to the yaw direction. As a result, the first rolling balls 1051 and 1052 can be supported so that they can roll without play in the pitch direction while contacting at two points.

In addition, two second rolling guide portions 1042 are provided on the surface opposite to the surface on which the first rolling guide portion 1041 is provided. The second rolling guide portion 1042 has a V-shaped cross section with respect to the pitch direction. As a result, the second rolling balls 1071 and 1072 can be supported so that they can roll without play in the yaw direction while touching at two points.

The second rolling guide portion 1042 of the first rolling guide unit 1041 and the two places of two places in the present embodiment, since each is provided on the same component, which describes the direction you respective support high precision be able to.

The first rolling balls (first rolling members) 1051 to 1053 are made of a material having high hardness in order to reduce rolling resistance and to make with high processing accuracy. The first rolling balls 1051 to 1053 support the guide member 104 so as to be movable in the pitch direction with respect to the fixed base plate 102.

  The first rolling receiving member 106 is made of a highly wear-resistant material such as stainless steel. Thereby, even if it uses a hard material for a rolling ball, it can endure long-term use, without a contact part being shaved. In this embodiment, the yoke of the electromagnetic actuator can also be used by using a ferromagnetic material such as martensitic stainless steel.

The first rolling receiving member 106 comes into contact with the fixed base plate 102 and is screwed. The first guide portions 1061 and 1062 are provided on the surface in contact with the fixed base plate 102. The first guide portion 1061 and 1062 has a cross section definitive in the yaw direction is formed in a V-shape. As a result, the first rolling balls 1051 and 1052 can be supported so that they can roll without play in the pitch direction while contacting at two points.

The second rolling balls (second rolling members) 1071 to 1073 are made of a material having high hardness in order to reduce rolling resistance and to make with high processing accuracy. Second rolling balls movably supported in the yaw direction of the movable lens barrel 103 relative to the guide member 104.

  The second rolling receiving member 108 is preferably made of a metal having excellent wear resistance, such as stainless steel.

The second rolling receiving member 108 is fixed in contact with the movable barrel 103. The second guide portions 1081 and 1082 are provided on the surface in contact with the movable lens barrel 103. The second guide part 1081, 1082 is cross-section definitive in the pitch direction is formed in a V-shape. Thus, the second rolling balls 1071 and 1072 can be supported so as to roll in the yaw direction while contacting at two points.

  The sub plate 109 is preferably made of a metal having excellent wear resistance, such as stainless steel. Moreover, it is desirable to produce by press work with mass productivity.

  The sub-plate 109 is fixed to the movable lens barrel 103 and contacts the second rolling ball 1073 to support the movable lens barrel 103 so as to be movable with respect to the fixed base plate 102.

  The feeding cable 110 is made of a flexible material. Electrical components such as a yaw coil, pitch coil, and LED to be detected attached to the movable lens barrel 103 are electrically connected to a power source (not shown). That is, the power supply cable 110 supplies power from the power source to the electrical components.

  The biasing spring (biasing member) 111 generates a biasing force (pressing force) between the movable lens barrel 103 and the fixed base plate 102.

  Note that the biasing member 111 may use an electrostatic force or a magnetic force in addition to an elastic member such as a spring. The movable barrel 103 is pressed against the fixed base plate 102 in the optical axis direction so that the first and second rolling balls are always in contact.

  Pitch magnets 1121 and 1122, pitch coil 115, first rolling receiving member 106, and upper yoke 114 constitute a pitch direction actuator.

Also, yaw magnets 1131 and 1132, a yaw coil 116, a first rolling receiving member 106, the upper yoke 114 constitute a yaw direction actuator.

  The pitch magnets 1121 and 1122 generate a magnetic field that generates thrust in the pitch direction when electric power is supplied to the pitch coil 115.

  The yaw magnets 1131 and 1132 generate a magnetic field that generates thrust in the yaw direction when power is supplied to the yaw coil 116.

  The upper yoke 114 and the first rolling receiving member 106 function as yokes for the pitch direction actuator and the yaw direction actuator, reduce the magnetic resistance of the respective magnets, and increase the efficiency of the actuator.

  Each actuator is a known electromagnetic actuator. In the present embodiment, the first rolling receiving member 106 also serves as the yoke of each actuator, thereby reducing the number of parts.

  In the present invention, the type of actuator is not limited, and a known actuator that moves the movable barrel 103 relative to the fixed base plate 102 in two directions orthogonal to the optical axis can be used. Specifically, an electrostatic actuator, a piezoelectric actuator, a giant magnetostrictive actuator, or the like may be used. Further, two 1-degree-of-freedom type actuators may be used as in this embodiment, or one 2-degree-of-freedom type actuator may be used.

  By fixing the first rolling receiving member 106, the pitch magnet 1121, and the yaw magnet 1131 to the fixed ground plate 102, a fixed unit is configured.

  Further, by fixing the correction lens 101, the second rolling receiving member 108, the sub plate 109, the feeding cable 110, the pitch coil 115, and the yaw coil 116 to the movable barrel 103, a barrel unit is obtained. At this time, the feeding cable 110 can be prevented from being peeled by arranging the feeding cable 110 so as to be sandwiched in a space provided between the movable lens barrel 103 and the second rolling receiving member 108. The power supply cable 110 may be provided not on the movable lens barrel 103 but on the fixed base plate 102. In this case, the feeding cable 110 can be prevented from being peeled by arranging the feeding cable 110 so as to be sandwiched in a space provided between the fixed ground plate 102 and the first rolling receiving member 106.

First rolling ball 1051,1052,1053 is sandwiched by the guide member 104 and the fixed section unit. The first rolling balls 1051 and 1052 are regulated by the first rolling guide portion 1041 provided on the guide member 104 and the first guide portions 1061 and 1062 provided on the first rolling receiving member 106. The Then, the guide member 104 is supported so as to be movable only in the pitch direction with respect to the fixed base plate 102. The position of the guide member 104 is determined stably in the direction of the optical axis by being supported by the three balls of the first rolling balls 1051, 1052, and 1053.

The second rolling balls 1071, 1072, 1073 are sandwiched between the guide member 104 and the lens barrel unit. The second rolling balls 1071 and 1072 are regulated by the second rolling guide portion 1042 provided on the guide member 104 and the second guide portions 1081 and 1082 provided on the second rolling receiving member 108. The The lens barrel unit is supported so as to be movable only in the yaw direction with respect to the guide member 104. The lens barrel unit is supported by the three balls, ie, the second rolling balls 1071, 1072, and 1073, so that the position is stably determined in the optical axis direction.

  At this time, the second rolling ball 1073 may be supported in contact with the guide member 104, or may be supported in contact with the first rolling ball receiving member 106 as in this embodiment. .

  Thereby, the movable lens barrel 103 is supported so as to be movable with respect to the fixed base plate 102 without rotating in a plane perpendicular to the optical axis.

  Then, the correction lens 101 can be moved to a predetermined position by generating a predetermined thrust in the pitch actuator and the yaw actuator.

  The effect of the present invention will be described by comparing FIG. 4 which is a schematic diagram of the present invention with FIG. 8 which is a schematic diagram of a conventional image blur correction apparatus.

  4 and 8 are diagrams in which the image blur correction apparatus is broken along a cross section parallel to the optical axis.

As shown in FIG. 8, the movable lens barrel 303 is attached to the surface of the second rolling receiving members 309 and 310 opposite to the surface with which the second rolling ball 308 contacts. Further, the fixed ground plate 302 is attached to the opposite side of the surface of the first rolling receiving members 306 and 307 where the first rolling ball 305 and the second rolling ball 308 are in contact. In other words, the fixed ground plate 302 and the movable lens barrel 303 are arranged between the first rolling receiving members 306 and 307 and the second rolling receiving members 309 and 310 , the first rolling ball 305 and the guide member 304. The second rolling ball 308 is interposed (via).

  Therefore, when the plate thickness of the first rolling receiving members 306 and 307 or the second rolling receiving members 309 and 310 varies, the position of the lens changes (for example, tilts obliquely). This is because the first and second rolling bearing members are desirably manufactured by press working with excellent mass productivity, but generally, in press working, the plate thickness may vary depending on the lot.

  On the other hand, in FIG. 4, the movable lens barrel 103 is attached to the surface of the second rolling receiving members 108 and 109 with which the second rolling balls 1072, 1072, and 1073 come into contact. In such a case, even if the thickness of the second rolling receiving members 108 and 109 varies, the positional relationship between the fixed ground plate 102 serving as a reference position with respect to other optical members and the correction lens 101. Will not be affected. Since the movable lens barrel 103 is not disposed via the second rolling receiving members 108 and 109 (thickness), the movable lens barrel 103 can be configured to have fewer error factors than the conventional image blur correction device. The optical performance of the correction device can be stabilized.

  In particular, when the second rolling receiving member is divided into a plurality of members such as the sub-plate 109 and the second rolling receiving member 108 as in this embodiment, even if the mutual plate thickness varies, the lens Inclination does not occur, and the optical performance of the image blur correction apparatus can be stabilized.

  Similarly, in FIG. 4, the fixed ground plate 102 is attached to the surface of the first rolling receiving member 106 where the first rolling balls 1051 and 1052 and the second rolling ball 1073 come into contact. Even in such a case, even if the plate thickness of the first rolling receiving member 106 varies, the positional relationship between the fixed ground plate 102 serving as a reference position with respect to other optical members and the correction lens 101 is maintained. There is no impact. Since the fixed ground plate 102 is not disposed via the first rolling receiving member 106 (the thickness thereof), the fixed ground plate 102 can be configured to have fewer error factors than the conventional image shake correction device. Optical performance can be stabilized.

  Also, by adopting such an arrangement, the thickness of the image shake correction apparatus in the optical axis direction can be reduced. This will be described in detail below.

  Conventionally, as shown in FIG. 8, the distance (thickness) from the lower end of the apparatus to the guide member 304 is (the thickness of the fixed ground plate + the thickness of the first rolling receiving member + the first rolling ball). ) Diameter).

However, in the present invention, as shown in FIG. 4, the fixed ground plate 102 and the first rolling balls 1051 and 1052 can be arranged in parallel in the optical axis direction, so the distance from the lower end of the apparatus to the guide member 104 Is sufficient as long as (the thickness of the first rolling receiving member + the diameter of the first rolling ball). That is, the first rolling balls 1051 and 1052 and the first opening 1022 of the fixed ground plate 102 are arranged in a plane perpendicular to the optical axis between the first rolling receiving member 106 and the guide member 104. Is arranged. Further, the second rolling ball 1073 and the first opening 1023 are arranged in a plane perpendicular to the optical axis between the second rolling receiving member 109 and the first rolling receiving member 106. It is arranged. As a result, the image blur correction device can be made thinner by the thickness of the fixed ground plane. At this time, the diameter of the first rolling ball needs to be at least larger than the thickness of the fixed ground plate in order to avoid interference with the fixed ground plate.

  Conventionally, the distance from the upper end of the apparatus to the guide member 104 is (the thickness of the movable lens barrel + the thickness of the second rolling receiving member + the diameter of the second rolling ball) as shown in FIG. Only needed.

However, in the present invention, as shown in FIG. 4, the movable lens barrel 103 and the second rolling balls 1071 to 1073 can be arranged in parallel in the optical axis direction. The distance only needs to be equal to (the thickness of the second rolling receiving member + the diameter of the second rolling ball). That is, the second rolling balls 1071 and 1072 and the second opening 1031 of the movable lens barrel 103 are arranged in a plane perpendicular to the optical axis between the second rolling receiving member 108 and the guide member 104. Are arranged as follows. Further, the second rolling ball 1073 and the second opening 1032 are arranged in a plane perpendicular to the optical axis between the second rolling receiving member 109 and the first rolling receiving member 106. It is arranged. As a result, the image blur correction device can be made thinner by the thickness of the movable barrel. At this time, the diameter of the second rolling ball needs to be at least larger than the thickness of the lens barrel in order to avoid interference with the movable lens barrel.

  Furthermore, as shown in FIGS. 2 and 3, the present invention is provided with a first opening in the fixed base plate 102 and a second opening in the movable lens barrel 103. Or an image blur correction device in which the position of the ball is difficult to be removed even during an impact.

  In the conventional image blur correction apparatus, as shown in FIG. 8, no parts are arranged around the rolling balls 305 and 308. For this reason, when the entire apparatus is subjected to vibration or impact and the movable lens barrel moves more than the depth of the guide portion in the optical axis direction, there is a problem that the ball falls off.

  On the other hand, in the present invention, as shown in FIG. 4, since a protective wall (side walls of the first and second openings) is arranged around the rolling ball, the rolling ball is also used during vibration and drop impact. Has an effect that it is difficult to be detached from the guide portion.

  In addition, since the ball is difficult to roll during assembly, workability is improved and assembly cost can be reduced. Further, in the conventional configuration, when a magnetic material is used for the ball, the assembly is difficult because the ball is attracted to the strong magnetic field created by the actuator. However, in this embodiment, since there is a protective wall that restricts the movement of the ball, a magnetic material can be used as the material of the ball.

  Further, according to the present invention, as shown in FIG. 4, the power feeding cable 110 is arranged in a narrow space provided between the second rolling ball receiving member 108 that is screw-fastened and the movable lens barrel 103. . For this reason, the power feeding cable 110 can be stably fixed to the movable lens barrel 103, there is no fear of peeling of the power feeding cable 110, and there is little fear that the power feeding cable rubs against other parts during the movement of the movable lens barrel 103. . Further, the image blur correction device can be made thinner by the thickness of the power feeding cable than in the conventional case (FIG. 8).

  In the present embodiment, the power feeding cable 110 is disposed as shown in FIG. 4, but the present invention is not limited to this. That is, the power feeding cable 110 may be disposed in a narrow space provided between the first rolling ball receiving member 106 fastened with screws and the fixed ground plate 102. Also in this case, the power supply cable 110 can be stably fixed to the fixed ground plate 102, there is no fear that the power supply cable 110 will peel off, and there is less concern that the power supply cable will rub against other parts while the movable lens barrel is moving. be able to. Further, the image blur correction device can be made thinner by the thickness of the power feeding cable than in the conventional case (FIG. 8).

  As described above, in the present embodiment, the image shake correction apparatus has been described. However, the image shake correction apparatus is applicable to an imaging apparatus such as a video camera, a digital camera, and a silver salt still camera, and an optical apparatus including an observation apparatus such as a binocular, a telescope, and a field scope. It can be installed. Therefore, an optical apparatus having the image shake correction apparatus of this embodiment also constitutes one aspect of the present invention.

  Next, lens shift to which the second embodiment of the present invention is applied will be described with reference to FIG.

  The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted.

6 (A) is through the center of the second rolling balls 1071 and 1072 in the present embodiment, a diagram taken along a cross section definitive in the pitch direction.

Also, FIG. 6 (B), passes through the center of the first rolling balls 1051 and 1052 of the present embodiment, a diagram taken along a cross section definitive in the yaw direction.

  This embodiment is different from the first embodiment only in the shape of the second rolling ball arrangement groove provided in the movable lens barrel 203 and the cross-sectional shape of the first rolling ball arrangement groove provided in the fixed ground plate 202. Others are the same as those in the first embodiment.

  As shown in FIG. 6A, the second rolling ball arrangement groove provided in the movable lens barrel 203 has a width of the upper bottom (the side in contact with the second rolling receiving member) as the second rolling ball. The trapezoidal cut surface is larger than the diameter (φd) and the width of the lower base (guide member side) is smaller than the diameter d. That is, the width of the upper base of the trapezoid is wider than the width d of the second rolling ball and narrower than the width 2d. If it is narrower than the width d, the second rolling ball will not enter. Further, if the width is larger than 2d, the assembly becomes difficult. Further, the width of the lower base of the trapezoid is narrower than the width d of the second rolling ball and wider than the width 2 / 3d. If it is wider than the width d, the second rolling ball can pass freely, making assembly difficult. Further, if the width is less than 2 / 3d, the second rolling ball comes into contact with the side wall of the second rolling ball arrangement groove and cannot roll. As a result, the second rolling balls 1071 and 1072 can be put in from one side and never come out from the other side. Accordingly, the second rolling balls 1071 and 1072 are placed in the movable barrel 203, and the second rolling bearing member 108 and the movable barrel 203 are fixed, so that the second rolling balls 1071 and 1072 are mirrored. It can be integrated with the cylinder unit.

  Accordingly, the second rolling balls 1071 and 1072 can be prevented from falling off even when subjected to vibration or impact. Moreover, workability at the time of assembling is improved, and assembling costs can be reduced.

  As shown in FIG. 6 (B), the first rolling ball arrangement groove provided on the fixed base plate 202 has an upper base (guide member side) width larger than the diameter (φd) of the first rolling ball. The trapezoidal cut surface is small and the width of the lower base (the side in contact with the first rolling receiving member) is larger than the diameter d. That is, the width of the upper base of the trapezoid is narrower than the width d of the first rolling ball and wider than the width 2 / 3d. When the width is larger than the width d, the first rolling ball can freely pass therethrough, making assembly difficult. Further, if the width is less than 2 / 3d, the first rolling ball comes into contact with the side wall of the first rolling ball arrangement groove and cannot roll. The width of the lower base of the trapezoid is wider than the width d of the first rolling ball and narrower than the width 2d. If it is narrower than the width d, the first rolling ball will not enter. Further, if the width is larger than 2d, the assembly becomes difficult. As a result, the first rolling balls 1051 and 1052 can be inserted from one surface and do not come out from the other surface. Accordingly, the first rolling balls 1051 and 1052 are placed in the fixed ground plate 202, and the first rolling receiving member 106 and the fixed ground plate 202 are fixed, whereby the first rolling balls 1051 and 1052 are fixed to the fixed unit. And can be integrated.

  Thereby, even when subjected to vibration or impact, the first rolling balls 1051 and 1052 can be prevented from falling off. Moreover, workability at the time of assembling is improved, and the assembling cost can be reduced.

  The image blur correction apparatus of the present invention can be applied to an image stabilization optical system that suppresses image blur.

DESCRIPTION OF SYMBOLS 101 Correction lens 102 Fixed base plate 103 Movable lens barrel 104 Guide member 105 1st rolling ball 106 1st rolling receiving member 107 2nd rolling ball 108 2nd rolling receiving member 110 Feeding cable

Claims (8)

Light Science elements that will be placed in the lens barrel is moved in a plane perpendicular to the optical axis A image blur correction apparatus for correcting image blur,
A first rolling member for moving the optical element in a first direction orthogonal to the optical axis ;
A first rolling receiving member that supports the first rolling member so as to roll in the first direction;
A guide member supported by the first rolling member and movable in the first direction;
A fixing member fixed to the surface of the first rolling receiving member on the side where the first rolling member is provided, and fixed to the barrel;
I have a,
The fixing member includes an image blur correction apparatus, characterized in that have a first through hole for accommodating the first rolling member. Light Science elements that will be placed in the lens barrel is moved in a plane perpendicular to the optical axis A image blur correction apparatus for correcting image blur,
A second rolling member for moving the optical element in a second direction different from the first direction orthogonal to the optical axis ;
A second rolling receiving member that supports the second rolling member so as to roll in the second direction;
A guide member supported by the second rolling member and movable in the first direction;
A movable member fixed to a surface of the second rolling receiving member on the side where the second rolling member is provided, and holding the optical element;
I have a,
It said movable member, the image blur correction apparatus, characterized in that have a second through hole that accommodates the second rolling member. A power supply cable for supplying power from the power supply;
The image blur correction device according to claim 1, wherein at least a part of the power feeding cable is disposed between the fixing member and the first rolling receiving member. A power supply cable for supplying power from the power supply;
The image blur correction device according to claim 2, wherein at least a part of the power feeding cable is disposed between the movable member and the second rolling receiving member. In the first through hole , the width of the opening on the side in contact with the first rolling receiving member is larger than the diameter of the first rolling member, and the width of the opening on the opposite side is the first width. The image blur correction device according to claim 1 , wherein the image blur correction device is smaller than a diameter of the rolling member. In the second through hole , the width of the opening on the side in contact with the second rolling receiving member is larger than the diameter of the second rolling member, and the width of the opening on the opposite side is the second width. The image blur correction device according to claim 2 , wherein the image blur correction device is smaller than a diameter of the rolling member. Optical apparatus having an image blur correction apparatus according to any one of claims 1 to 6. An image blur correction apparatus that corrects image blur by moving an optical element arranged in a lens barrel in a plane perpendicular to the optical axis,
A first rolling member for moving the optical element in a first direction orthogonal to the optical axis;
A second rolling member for moving the optical element in a second direction different from the first direction;
A first rolling receiving member that supports the first rolling member so as to roll in the first direction;
A second rolling receiving member that supports the second rolling member so as to roll in the second direction;
A guide member supported by the first rolling member and the second rolling member and movable in the first direction;
A fixing member fixed to the surface of the first rolling receiving member on the side where the first rolling member is provided, and fixed to the barrel;
A movable member fixed to a surface of the second rolling receiving member on the side where the second rolling member is provided, and holding the optical element;
Have
The fixed member has a first through hole that accommodates the first rolling member, and the movable member has a second through hole that accommodates the second rolling member. Image blur correction device.